Improvement in machines for burnishing metals



PATENT OFFICE.

JEREMIAH STEVER, OF BRISTOL, CONNECTICUT.

IMPROVEMENT IN MAGHTNES FOR BU'RNISHING METALS.

Specification forming part of Letters Patent No. 1?.799, dated May l, 1855.

To @Z who/ir it may concern:

Be it known that I, J nnnirrnn Srnvnn., of Bristol, in the county of Hartford and State of Connecticut, have invented a new and use-V iul Improvement or Machine for Burnishing Metals or Articles Composed of Metal or other Material; and I do hereby declare that the lsame is fully described and represented in the following specification and the accompanying i drawings, letters, gures, and references thereoi'. i

[n the said drawings, Figure 1 is a top view,

and Fig. 2 a side elevation, and Fig. 3 an end elevation, ot' my said machine.

In the said drawings, A denotes a burnishing-tool fixed to a horizontal slide-bar, B, supported by a frame, C. Such frame carries two horizontal shafts, D E, the latter of which is a rocker-shaft, while the former is the driving-shaft ot' the machine. The said rockershaft has a bow orstirrup, F,\aftixed to one end of it, and formed of two curved arms extending in opposite directions from the axis of the shaft, and united together at their outer ends by a rod, G, on which is placed a slider,

H. Jointed to this slider and the slide Bis a connecting-rod, I, the joints of the same and the slider H being arranged so that when the slider is .depressed far enough on the rod G they may be brought into line with the axis of the rocker-shaft E. When in such position, the slide is sustained upon a screw-nut, K, screwed upon the rod G. The stirrup is connected to the driving'shaft by means of a rod, L, which is so applied to the driving-shaft and the stirrup as to cause the shaft E to have a rocking or reciprocating rotary motion produced by a continuous rotary motion of the drivingshaft., The slider H is raised or lowered upon the rod G by means of a fork, M, which, if necessary, may be made'to extend upward from a treadle placed under the ma chine.

By means of the mechanism above described the burnisher may not only havea reciprocating movement imparted to it, but such movement may be either arrested or regulated, as occasion may require, while the rocker-shaft is in movement.

In burnishing metallic articles, and particularly those that are ornamented, it often becomes necessary to employ a very short movement of the burnishing-tool, and at the same time to impart to the tool a very rapid movement. Vith my machine all this can be effected, the extent of motion of the tool being regulated or entirely arrested, while the main part ot' the machinery which effects the move ment of the tool still continues in action.

The immense importance of a burnishingmachine made to operate in the abovedescribed manner can only be estimated by persons skilled inthe art of burnishing metallic articles, and particularly those more or less covered with ornaments in relief or sunk below their surfaces.

In testimony whereof I have hereunto set my signature this 30th day of September, A.

JEREMIAH STEVER.

Vit-nesses:

ELIJAH DAnRow, HENRY A. MITCHELL. f 

